FILENAMES:

hardness-conversions1.jpg
hardness-conversions2.jpg
hardness-cyl-correction1.jpg
hardness-cyl-correction2.jpg
hardness-minthickness.jpg
hardness-rockwell-application.jpg 

DESCRIPTION:

These are scans of charts related to hardness testing. 

Posted by Samuel Lindhorst <saml@chartermi.net>.  

The following description was provided:

=================================================================

Just some scans of some old but still useful charts I have.  
Good hardness info, and with a little reading some stuff 
about hardness may get a little clearer.  Like "what the 
heck is a 15T scale anyway?